Sec[Section] 1. Be it enacted by the people of the State of Illinois, Represented in the General Assembly That the appointment of Assessors and the assessment of taxes in and for the county of Dupage for the year one thousand eight hundred and thirty-nine, shall be as good and valid to all intents and purposes, as if the same had been made at the periods directed by the act entitled “An act concerning the public Revenue,” approved February 26^th, 1839, and that any person feeling aggrieved by the valuation of taxable property may apply to the County Commissioners’ Court of the said county to be holden in March next, for such relief as is authorized by the aforesaid act concerning the Public Revenue, and the said Court may then grant such relief as could have been granted by laws at the June term of such Court.